C# Discussion Boards - CodeProject

Re: Control box doesnt exit application

3-Apr-07 8:56

Have you coded a Form Closing event handler? If so, what's in it?

:..::. Douglas H. Troy ::..

Bad Astronomy |VCF|wxWidgets|WTL

mfmaneef3-Apr-07 9:05

mfmaneef

3-Apr-07 9:05

well i didnt code FormClosing event..but now i tried that but still same?? why is that ?

here is the formclosing code i did now

 private void frmMain_FormClosing(Object sender, FormClosingEventArgs e) {<br />
          Application.ExitThread();<br />
          Application.Exit();<br />
<br />
}

any solutions please Confused | :confused:

aneef

Re: Control box doesnt exit application

Douglas Troy3-Apr-07 9:27

Using .NET C# UI control from Visual Studio 6 C++

3-Apr-07 9:27

Well, the default behavior for that control box, is to close the form, so you must have code somewhere that's preventing this from happening.

What's in the Program.cs ? Do you have anything following the Application.Run() ?

You're best bet is going to be to step through your code in the debugger and find out where your form is being hidden and why your application is not terminating.

:..::. Douglas H. Troy ::..

Bad Astronomy |VCF|wxWidgets|WTL

StephenJB3-Apr-07 8:17

StephenJB

3-Apr-07 8:17

Is is possible to create a user interface control in C# .NET 2002 or 2003 that can be used by a Visual Studio 6.0 C++ dialog. I must substitute old J++ ActiveX user interface controls and rewrite then in C#. I have been doing research and have seen that it is possible to access .NET managed assemblies from unmanaged COM components, but these technical articles don't appear to address my problem. Is there some way I can convert a .NET control to an ActiveX component so that it will be accepted by the Visual Studio 6 C++ dialog builder? Any help, tips, assistance will be greatly appreaciated.

Steve J B

Saving project to file

sinosoidal3-Apr-07 7:02

3-Apr-07 7:02

Hi,

I'm building a MDI application which will have a project enviorment.

I have never built such kind of complex application.

I have several datastructures which i need to store in order to keep a state.

I would like to ask how should i record all this into a file.

Thx,

Nuno

Douglas Troy3-Apr-07 7:21

3-Apr-07 7:21

Well now, that's up to you. You could:

- Serialize the data to an Xml file(s)
- Store it in a database (e.g., SQLite, Firebird, MySQL, MSDE, etc...)
- Save it off in your own structured file

There is no 'one way' that is set in stone, and each has it's own pros/cons.

These are all design decisions that you need to make yourself.

:..::. Douglas H. Troy ::..

Bad Astronomy |VCF|wxWidgets|WTL

sinosoidal3-Apr-07 7:25

3-Apr-07 7:25

Yes, of course.

But tell me, assuming that i want to use the saving to file in a own structure.

How should i save several types of classes in a unified way? Do you understand my question?

Example.

I have Lists, variables, etc.

How should i do it?

The only time i done that was some years ago in C, using a fwrite to store many strucutres of determined type.

How should i do it here?

Thx,

Nuno

Douglas Troy3-Apr-07 7:29

3-Apr-07 7:29

Have a look at the System.IO classes for StreamReader, StreamWriter, etc...

MSDN Link[^]

:..::. Douglas H. Troy ::..

Bad Astronomy |VCF|wxWidgets|WTL

sinosoidal3-Apr-07 23:31

3-Apr-07 23:31

Hi,

It was missing the allow drop property set to true in the target control.

Thx,

Nuno

sinosoidal3-Apr-07 23:37

Implementing drag and drop funcionality

3-Apr-07 23:37

Post in wrong thread!

Sorry

Nuno

sinosoidal3-Apr-07 6:56

Re: Implementing drag and drop funcionality

3-Apr-07 6:56

Hi,

I'm trying to implemenent some drag and drop functionality.

Basicly i have two controls:

- A listbox, the source of drag
- A tabcontrol, the destiny of drag

Well, i have wrote the following events:

<br />
void layoutPanelOnMouseDown(object sender, MouseEventArgs me)<br />
{<br />
    Layout temp = null;<br />
    ListBox lb = (ListBox)sender;<br />
    int index = lb.IndexFromPoint(me.X, me.Y);<br />
    if (index >= 0)<br />
    {<br />
        lb.DoDragDrop((string) lb.Items[index], DragDropEffects.Copy);<br />
    }<br />
}<br />

<br />
void displayEditorOnDragEnter(object sender, DragEventArgs de)<br />
        {<br />
            if (de.Data.GetDataPresent(DataFormats.Text))<br />
            {<br />
                de.Effect = DragDropEffects.Copy;<br />
            }<br />
            else<br />
            {<br />
                de.Effect = DragDropEffects.None;<br />
            }<br />
<br />
        }<br />

<br />
void displayEditorOnDragDrop(object sender, DragEventArgs de)<br />
        {<br />
            string layoutName = (string)de.Data.GetData(DataFormats.Text);<br />
        }<br />

I have 3 tabs in the tabcontrol and i want to apply this to the first tab.

When i try to do something with this, i can drag, but i cant drop.

This is in a MDI application where the listbox is in the main form and the tabcontrol is in the child form.

Any tips?

Thx,

Nuno

Douglas Troy3-Apr-07 7:22

Re: Implementing drag and drop funcionality

3-Apr-07 7:22

Go look at this C# examples page Item #8 is a Drag and Drop example[^]

:..::. Douglas H. Troy ::..

Bad Astronomy |VCF|wxWidgets|WTL

sinosoidal3-Apr-07 23:41

how to convert unicode to int in C#?

3-Apr-07 23:41

Hi,

It was missing the allow drop property set to true in the target control.

But now i have another problem:

I want to pass thru the drag and drop a class made by me.

As i can see the allowed formats for drag and drop have a specific set of types.

What type should i use to pass a custom class?

My other option is pass text and then get it based on the text, but using that form i then need to access the MDI parent to have access to the structure that holds the item i need.

Any tips?

Thx,

Nuno

OmarLodhi3-Apr-07 6:55

OmarLodhi

3-Apr-07 6:55

Hi,
i have a unicode string in arabic language. i want to convert it to its integer value. but when i use Convert.Int32(unicodestring). it raises exception that the input is in invalid format. please guide me how to convert unicode string to int.
Regards,
Omar Lodhi

Vikram A Punathambekar3-Apr-07 7:07

Vikram A Punathambekar

3-Apr-07 7:07

Posting the relevant code sample would be helpful. Also, you can try Int32.Parse().

Cheers,
Vikram.

The cold will freeze our stares
We won't care...

Wayne Phipps3-Apr-07 9:32

Wayne Phipps

3-Apr-07 9:32

How many characters in the string? Maybe thats the problem?

Perhaps you need to ittereate through each character of the string in turn, something like:

foreach( char character in unicodeString )
{
     int charValue = Convert.ToInt32( character );
}

Just an idea.

If your still stuck, you should post some of your code.

Regards

Wayne Phipps
____________

Time is the greatest teacher... unfortunately, it kills all of its students
View my Blog

OmarLodhi3-Apr-07 15:34

OmarLodhi

3-Apr-07 15:34

Hi,
i have to convert a unicode string to its hex equilent. i have converted this from a VB6 code that uses AscW() method to convert unicode to a integer value and then to Hex value.

Here is code
String strSrc="جمل هندسة في الدنيا أن تبني جسرا من الأمل على بحر من اليأس..";
strResult = "";
for (int i = 0; i < strSrc.Length; i++)
{
try
{
//tried this one get exception
//nVal = Int32.Parse(strSrc.Substring(i, 4));
//tried also statement below also get exception
nVal = Convert.ToInt32(strSrc.Substring(i, 4));
strHex = Convert.ToString(nVal, 16);
strResult += strHex;
}
catch (FormatException e)
{
;
}
}

Exceptoin error string is "Input was not in correct format"

Thanks and Regards,
Omar

Vikram A Punathambekar3-Apr-07 18:23

Vikram A Punathambekar

3-Apr-07 18:23

Sorry, mate; I don't know any Arabic, so I have no idea if the string you have is a valid numeric string. If what you have is indeed a VALID numeric string in Arabic, perhaps the problem is the locale/culture settings.

Int32.Parse() and Convert.ToInt32() both have various overloads - why don't you check them out? Pay special attention to the ones that take a CultureInfo parameter. Also, given Arabic is an RTL language, are you sure Substring() is returning the correct substring?

Cheers,
Vikram.

The cold will freeze our stares
We won't care...

how to use webbrowserControl

OmarLodhi3-Apr-07 21:26

OmarLodhi

3-Apr-07 21:26

Hi,
i think RTL is only for displaying data. in case of string storage it is stored just same as normal string. this code is working in VBA that reads unicode converts unicode string to hex format. do you know any method equivalent to VB method AscW for getting code of any unicode character.

Thanks,
Omar

pashitech3-Apr-07 6:22

pashitech

3-Apr-07 6:22

hi all,
i've developed a small software [windows application]and i wanna make a privilage/provision that,
user will have a button[update] in my appliation where in which i will provide current version
whenevr user click on update buttton,
i need to compare that current version with the version that is available on my website.

PLEASE HELP ME HOW TO DO THIS,
thnx in advance,
i am using C#.Net and VS2005

prashanth

Re: how to use webbrowserControl

Douglas Troy3-Apr-07 6:30